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SPC5644AF0MLU2 Datasheet(PDF) 16 Page - Freescale Semiconductor, Inc |
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SPC5644AF0MLU2 Datasheet(HTML) 16 Page - Freescale Semiconductor, Inc |
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16 / 138 page  MPC5644A Microcontroller Data Sheet, Rev. 7 Freescale Semiconductor 16 be used primarily as a vehicle serial data bus, meeting the specific requirements of this field: real-time processing, reliable operation in the EMI environment of a vehicle, cost-effectiveness and required bandwidth. Each FlexCAN module contains 64 message buffers. The FlexCAN modules provide the following features: • Based on and including all existing features of the Freescale TouCAN module • Full Implementation of the CAN protocol specification, Version 2.0B — Standard data and remote frames — Extended data and remote frames — Zero to eight bytes data length — Programmable bit rate up to 1 Mbit/s • Content-related addressing • 64 message buffers of zero to eight bytes data length • Individual Rx Mask Register per message buffer • Each message buffer configurable as Rx or Tx, all supporting standard and extended messages • Includes 1088 bytes of embedded memory for message buffer storage • Includes 256-byte memory for storing individual Rx mask registers • Full featured Rx FIFO with storage capacity for six frames and internal pointer handling • Powerful Rx FIFO ID filtering, capable of matching incoming IDs against 8 extended, 16 standard or 32 partial (8 bits) IDs, with individual masking capability • Selectable backwards compatibility with previous FlexCAN versions • Programmable clock source to the CAN Protocol Interface, either system clock or oscillator clock • Listen only mode capability • Programmable loop-back mode supporting self-test operation • 3 programmable Mask Registers • Programmable transmit-first scheme: lowest ID, lowest buffer number or highest priority • Time Stamp based on 16-bit free-running timer • Global network time, synchronized by a specific message • Maskable interrupts • Warning interrupts when the Rx and Tx Error Counters reach 96 • Independent of the transmission medium (an external transceiver is assumed) • Multi-master concept • High immunity to EMI • Short latency time due to an arbitration scheme for high-priority messages • Low power mode, with programmable wake-up on bus activity 1.4.17 FlexRay The MPC5644A includes one dual-channel FlexRay module that implements the FlexRay Communications System Protocol Specification, Version 2.1 Rev A. Features include: • Single channel support • FlexRay bus data rates of 10 Mbit/s, 8 Mbit/s, 5 Mbit/s, and 2.5 Mbit/s supported • 128 message buffers, each configurable as: — Receive message buffer — Single buffered transmit message buffer — Double buffered transmit message buffer (combines two single buffered message buffer) • 2 independent receive FIFOs |
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